Hibernate supports Query cache and provide statistics about query and database status. 6) Provides Query Statistics and Database Status 5) Simplifies Complex Joinįetching data from multiple tables is easy in hibernate framework. So there is no need to create tables in the database manually. Hibernate framework provides the facility to create the tables of the database automatically. Before Hibernate, if database is changed for the project, we need to change the SQL query as well that leads to the maintenance problem. In this comprehensive Hibernate tutorial for beginners & professionals. So you don't need to write database specific queries. It generates the database independent queries. HQL (Hibernate Query Language) is the object-oriented version of SQL. There are two types of cache in hibernate framework first level cache and second level cache. The performance of hibernate framework is fast because cache is internally used in hibernate framework. Hibernate framework is open source under the LGPL license and lightweight. Advantages of Hibernate Frameworkįollowing are the advantages of hibernate framework: 1) Open Source and Lightweight The javax.persistence package contains the JPA classes and interfaces. Java Persistence API (JPA) is a Java specification that provides certain functionality and standard to ORM tools. The ORM tool internally uses the JDBC API to interact with the database. Hibernate is a high-performance Object/Relational persistence and query service, which is licensed under the open source GNU Lesser General Public License (LGPL) and is free to download. It is a programming technique that maps the object to the data stored in the database. Hibernate implements the specifications of JPA (Java Persistence API) for data persistence.Īn ORM tool simplifies the data creation, data manipulation and data access. It is an open source, lightweight, ORM (Object Relational Mapping) tool. Hibernate is a Java framework that simplifies the development of Java application to interact with the database. It was started in 2001 by Gavin King as an alternative to EJB2 style entity bean. Create HibernateUtil.java under package and copy following content into it.This hibernate tutorial provides in-depth concepts of Hibernate Framework with simplified examples. true update Code language: HTML, XML ( xml ) HibernateUtil.java – This is the Util file that we use to create connection with hibernate. Jdbc:mysql://localhost:3306/ContactManager Create under resources folder and copy following content into it. This file will contain configurations such as database connection information, persistence class info etc. – This is the Hibernate configuration file. Birthdate Homepage Delete, ">link ">delete Code language: HTML, XML ( xml ) Adding Hibernate Support For adding hibernate support, we will add following source code in Contact Manager application. Contact Manager - Struts2 Hibernate Example Contact Manager Contacts Name Email Cell No. Create a JSP file index.jsp in WebContent folder and copy following content into it. The JSP will include a form to add new contact as well as will list the contacts at the end. Create JSP for Contact Manager We will need only one JSP file for this tutorial. Create this folder if it does not exists. Required JAR Files Now copy all the required JAR files in WebContent -> WEB-INF -> lib folder. And finally the will have some hibernate related util file that will be see shortly. The will contain the struts2 action class. The package will hold the Hibernate persistent model class. The will hold the Java class that will act as controller and will fetch the data from database and pass it to view. As we will use Struts2, we will follow MVC architecture. Also we will create Java packages for our application. Right click on Project in project explorer and select New -> Source Folder and create a folder with name resources. We will need a source folder called resources. This is to run the project inside Eclipse environment. Once this is done, select the target runtime environment (e.g. After selecting Dynamic Web Project, press Next. Code language: SQL (Structured Query Language) ( sql ) Creating Project in Eclipse Open Eclipse and goto File -> New -> Project and select Dynamic Web Project in the New Project wizard screen.
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